Subversion Repositories SmartDukaan

package in.shop2020.utils;

import java.io.File;

import java.security.Security;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import java.util.Properties;

import javax.activation.DataHandler;

import javax.activation.DataSource;

import javax.activation.FileDataSource;

import javax.mail.Message;

import javax.mail.MessagingException;

import javax.mail.Multipart;

import javax.mail.PasswordAuthentication;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.AddressException;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeBodyPart;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMultipart;

import javax.mail.util.ByteArrayDataSource;

public class GmailUtils {

    private static final String SMTP_HOST_NAME = "smtp.gmail.com";

    private static final String SMTP_PORT = "465";

    private static final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";

    public GmailUtils(){

    }

    public void sendSSLMessage(String recipients[], String subject, String message, final String from, final String password, String filename) throws MessagingException {

        try {

            Message msg = prepareMessage(recipients, subject, from, password);

            //Create the multi-part object to hold the text and attachment parts

            Multipart multipart = new MimeMultipart();

            // create the message part 

            MimeBodyPart messageBodyPart = new MimeBodyPart();

            //Part 1: Text message

            messageBodyPart.setText(message);

            multipart.addBodyPart(messageBodyPart);

            //Part 2: Attachment

            messageBodyPart = new MimeBodyPart();

            DataSource source = new FileDataSource(filename);

            messageBodyPart.setDataHandler(new DataHandler(source));

            String[] names = filename.split("/");

            messageBodyPart.setFileName(names[names.length - 1]);

            multipart.addBodyPart(messageBodyPart);

            // Put parts in message

            msg.setContent(multipart);

            Transport.send(msg);

        } catch (Exception e) {

            // If there is any error with normal mail sending, try diving receipients across domains

            if (hasMultipleDomains(recipients)) {

                for (List<String> subReceipients : getReceipientsPerDomain(recipients).values()) {

                    sendSSLMessage(subReceipients.toArray(new String[0]), subject, message, from, password, filename);

                }

                return;

            }

            throw new MessagingException(e.getMessage(), e);

        }

    }

    /**

     * @param recipients

     * @return

     */

    private Map<String, List<String>> getReceipientsPerDomain(String[] recipients) {

        Map<String, List<String>> result = new HashMap<String, List<String>>();

        for (String recipient : recipients) {

            String domain = extractDomainFromEmailAddress(recipient);

            if (!result.containsKey(domain)) {

                result.put(domain, new ArrayList<String>());

            }

            result.get(domain).add(recipient);

        }

        return result;

    }

    /**

     * @param recipients

     * @return

     */

    private boolean hasMultipleDomains(String[] recipients) {

        String domain = extractDomainFromEmailAddress(recipients[0]);

        for (String recipient : recipients) {

            if (!domain.equals(extractDomainFromEmailAddress(recipient))) {

                return true;

            }

        }

        return false;

    }

    private String extractDomainFromEmailAddress(String recipient) {

        return recipient.split("@")[1];

    }

    public void sendSSLMessage(String recipients[], String subject, String message, final String from, final String password, List<File> files) throws MessagingException {

        try {

            Message msg = prepareMessage(recipients, subject, from, password);

            //Create the multi-part object to hold the text and attachment parts

            Multipart multipart = new MimeMultipart();

            // create the message part 

            MimeBodyPart messageBodyPart = new MimeBodyPart();

            //Part 1: Text message

            messageBodyPart.setText(message);

            multipart.addBodyPart(messageBodyPart);

            //Part 2: Attachment

            for (File file : files) {

                DataSource source = new FileDataSource(file);

                String[] names = file.getAbsolutePath().split("/");

                messageBodyPart = new MimeBodyPart();

                messageBodyPart.setDataHandler(new DataHandler(source));

                messageBodyPart.setFileName(names[names.length - 1]);

                multipart.addBodyPart(messageBodyPart);

            }

            // Put parts in message

            msg.setContent(multipart);

            Transport.send(msg);

        } catch (Exception e) {

            // If there is any error with normal mail sending, try diving receipients across domains

            if (hasMultipleDomains(recipients)) {

                for (List<String> subReceipients : getReceipientsPerDomain(recipients).values()) {

                    sendSSLMessage(subReceipients.toArray(new String[0]), subject, message, from, password, files);

                }

                return;

            }

            throw new MessagingException(e.getMessage(), e);

        }

    }

    @SuppressWarnings("restriction")

    private Message prepareMessage(String[] recipients, String subject,

            final String from, final String password) throws AddressException,

            MessagingException {

        boolean debug = true;

        Properties props = new Properties();

        props.put("mail.smtp.host", SMTP_HOST_NAME);

        props.put("mail.smtp.auth", "true");

        props.put("mail.debug", "true");

        props.put("mail.smtp.port", SMTP_PORT);

        props.put("mail.smtp.socketFactory.port", SMTP_PORT);

        props.put("mail.smtp.socketFactory.class", SSL_FACTORY);

        props.put("mail.smtp.socketFactory.fallback", "false");

        Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());

        Session session = Session.getDefaultInstance(props,

                new javax.mail.Authenticator() {

                    protected PasswordAuthentication getPasswordAuthentication() {

                        return new PasswordAuthentication(from, password);

                    }

                });

        session.setDebug(debug);

        Message msg = new MimeMessage(session);

        //Set the from address

        InternetAddress addressFrom = new InternetAddress(from);

        msg.setFrom(addressFrom);

        //Set the recipients

        InternetAddress[] addressTo = new InternetAddress[recipients.length];

        for (int i = 0; i < recipients.length; i++) {

            addressTo[i] = new InternetAddress(recipients[i]);

        }

        msg.setRecipients(Message.RecipientType.TO, addressTo);

        //Setting the Subject

        msg.setSubject(subject);

        return msg;

    }

    public static void main(String args[]) throws Exception {

        String[] sendTo = { "mandeep.dhir@shop2020.in", "mandeep.dhir@gmail.com", "mandeepcse07@yahoo.co.in", "anupam.singh@shop2020.in" };

        String emailSubjectTxt = "Another test from gmail";

        String emailMsgTxt = "Test Message Contents";

        String emailFromAddress = "mandeep.dhir@shop2020.in";

        String password = "";

        String filename = "/home/mandeep/virtual_warehouse.sql";

        GmailUtils utils = new GmailUtils();

        utils.sendSSLMessage(sendTo, emailSubjectTxt, emailMsgTxt, emailFromAddress, password, filename);

        System.out.println("Sucessfully Sent mail to All Users");

    }

}